Coconut man, moon heads, and pee?

Ways to make me feel like an old geezer, #142.

What is Jessie J talking about at the top of "Price Tag?" Are these shout outs to people? Is this part of some Illuminati code? Has a sleeper cell been activated?

UPDATE: Thanks to Danielle in the comments, I now know that the line goes: "Coconut Man, Moon Head, and Pea." They're all people.